Ethiopia Amhara violence: Why are militias and government forces fighting?

There has been an outbreak of violence in Ethiopia's Amhara region between government forces and Fano militias, in the volatile northwestern region of Amhara.

Although calm has returned in some major cities, clashes are being reported in smaller towns.

What is behind the new wave of fighting, and what are the repercussions?

The BBC's Anthony Irungu explains.